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Subject[PATCH] fix UNEVICTABLE_LRU + !PROC_PAGE_MONITOR build
Both CONFIG_PROC_PAGE_MONITOR and CONFIG_UNEVICTABLE_LRU depend on
mm/pagewalk.c being built. Create a CONFIG_PAGE_WALKER Kconfig
variable that is automatically selected if needed.

Debugged-by: Benjamin Kidwell <benjkidwell@yahoo.com>
Signed-off-by: Rik van Riel <riel@redhat.com>

---
init/Kconfig | 1 +
mm/Kconfig | 5 +++++
mm/Makefile | 2 +-
3 files changed, 7 insertions(+), 1 deletion(-)

Index: linux-2.6.26-rc5-mm2/init/Kconfig
===================================================================
--- linux-2.6.26-rc5-mm2.orig/init/Kconfig 2008-06-10 10:46:29.000000000 -0400
+++ linux-2.6.26-rc5-mm2/init/Kconfig 2008-06-13 13:57:11.000000000 -0400
@@ -803,6 +803,7 @@ source "arch/Kconfig"
config PROC_PAGE_MONITOR
default y
depends on PROC_FS && MMU
+ select PAGE_WALKER
bool "Enable /proc page monitoring" if EMBEDDED
help
Various /proc files exist to monitor process memory utilization:
Index: linux-2.6.26-rc5-mm2/mm/Kconfig
===================================================================
--- linux-2.6.26-rc5-mm2.orig/mm/Kconfig 2008-06-11 14:39:43.000000000 -0400
+++ linux-2.6.26-rc5-mm2/mm/Kconfig 2008-06-13 13:58:24.000000000 -0400
@@ -206,9 +206,14 @@ config VIRT_TO_BUS
def_bool y
depends on !ARCH_NO_VIRT_TO_BUS

+# automatically selected by UNEVICTABLE_LRU or PROC_PAGE_MONITOR
+config PAGE_WALKER
+ def_bool n
+
config UNEVICTABLE_LRU
bool "Add LRU list to track non-evictable pages"
default y
+ select PAGE_WALKER
help
Keeps unevictable pages off of the active and inactive pageout
lists, so kswapd will not waste CPU time or have its balancing
Index: linux-2.6.26-rc5-mm2/mm/Makefile
===================================================================
--- linux-2.6.26-rc5-mm2.orig/mm/Makefile 2008-06-10 10:46:29.000000000 -0400
+++ linux-2.6.26-rc5-mm2/mm/Makefile 2008-06-13 13:58:42.000000000 -0400
@@ -13,7 +13,7 @@ obj-y := bootmem.o filemap.o mempool.o
prio_tree.o util.o mmzone.o vmstat.o backing-dev.o \
page_isolation.o $(mmu-y)

-obj-$(CONFIG_PROC_PAGE_MONITOR) += pagewalk.o
+obj-$(CONFIG_PAGE_WALKER) += pagewalk.o
obj-$(CONFIG_BOUNCE) += bounce.o
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o
obj-$(CONFIG_HAS_DMA) += dmapool.o


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